JP2021197643A - Video code stream editing device and program - Google Patents

Abstract

To reduce deterioration of quality when partially editing a video code stream.SOLUTION: A code stream editing device 1 includes: a decoder 12 that generates a pre-replacement video by decoding a GOP to be replaced including a replacement section in a pre-replacement stream; a video replacement unit 13 that replaces a video in the replacement section of the pre-replacement video with the replacement video to generate a post-replacement video; a video clipping unit 14 that generates a clipped video obtained by excluding frames that do not refer to frames after a start point frame during encoding, which are frames positioned before the start point frame of the replacement section in the display order in the post-replacement video, and calculates an upper limit of a code amount of the clipped video; an encoder 15 that encodes the clipped video with a code amount that is less than the upper limit of the code amount and generates a replacement stream; and a partial replacement unit 16 that replaces the section corresponding to the clipped video of the pre-replacement stream with the replacement stream to generate a post-replacement stream.SELECTED DRAWING: Figure 1

Description

The present invention relates to a video-coded stream editing device and a program for editing a video-coded stream.

At the broadcasting station, a completed program that can be broadcast as a program as it is is provided by AVC (Advanced Video Coding) / H. Files are often managed in the form of a video-coded stream encoded by a video coding method such as 264 (see, for example, Non-Patent Document 1). The file of the completed program is recorded on the sending server and waits for the sending time (broadcast time).

If a part that needs to be modified is found in the completed program recorded on the sending server, partial replacement editing is performed to replace only the part that needs to be modified with the correct content. Partial replacement editing is often performed when there is a problem with a specific cut and only this cut is replaced, or when there is an error in the character of the telop and only the frame to which this telop is added is corrected.

AVC / H. 264 and HEVC (High Efficiency Video Coding) / H. Video coding schemes such as 265 use I-pictures encoded using only in-frame prediction, P-pictures encoded using inter-frame prediction with one-way prediction, and inter-frame prediction with bidirectional prediction. The video coded stream is composed of the B pictures encoded by the above. It is possible to reduce the code amount by using the inter-frame prediction, and the code amount assigned to each picture is the largest for the I picture, the second largest for the P picture, and the smallest for the B picture. As a method of managing the code amount, a method of determining an upper limit of the code amount per frame and a method of determining an upper limit of the code amount average of continuous N frames are known. Further, in a coded stream using inter-frame prediction, it is common to use a method of setting an upper limit of the code amount in units of 1 GOP (from the I picture to the frame immediately before the next I picture).

In the system disclosed in Non-Patent Document 1, as shown in Table 1, the completed program is AVC / H. In the 264 video coding method, the video coding stream is composed only of I pictures encoded by using only in-frame prediction. Since this video-coded stream is composed of only I-pictures that can be decoded by itself, it is not necessary to decode the video-coded stream once and encode it again when performing partial replacement editing. Therefore, it is possible to easily perform partial replacement editing of a section whose start point and end point are arbitrary frames. Further, since the coded stream is composed of only I pictures, it is possible to set the upper limit of the code amount assigned to each picture to a uniform value. For example, when the maximum bit rate is 600 M [bps] and the frame rate is 60 [fps], the upper limit of the code amount of each frame is 10 Mbits. Therefore, even when the replacement section is coded, the code amount of each frame may be coded so as to be equal to or less than the upper limit value, and the code amount management is easy.

As described above, the system disclosed in Non-Patent Document 1 adopts an I-picture-only structure (IntraOnly) for ease of editing. However, although IntraOnly is easy to edit, the coding efficiency is low. On the other hand, a structure using a P picture encoded using inter-frame prediction by one-way prediction and a B picture encoded using inter-frame prediction by two-way prediction (Long GOP (Group of Pictures)) is Although it is difficult to edit easily, it has an advantage that the coding efficiency is high because the coding is performed by utilizing the correlation between frames.

The system disclosed in Non-Patent Document 1 targets HD (High Definition) video, and AVC / H. It is operated at 264, IntraOnly, and 50 Mbps, but when targeting 8K super high-definition video, which is expected to become widespread in the future, a coding method with higher coding efficiency as the amount of information in the video signal increases. , Adoption of GOP structure is required.

In FIG. 7, 8K super high-definition video is shown in HEVC (High Efficiency Video Coding) / H. 265 shows a graph of bit rate and PSNR (Peak Signal Noise Radio) when encoded with Intra Only and Long GOP. The higher the PSNR value, the less the deterioration of image quality. The images to be encoded are Kaede (Fig. 7 (a)) and diesel railcar (Fig. 7 (a)), which are the test charts of the ultra-high-definition, wide color gamut standard moving image-A series provided by the Institute of Image Information and Television Engineers (ITE). FIG. 7 (b)). The GOP structure of Long GOP was M = 4, N = 32, and Temporal_ID = 2. From this figure, 8K Super Hi-Vision video is displayed in HEVC / H. When coding at 265, it can be confirmed that Long GOP is advantageous over Intra Only.

Further, in Patent Document 1, the first partial stream from the MPEG video stream 1 to immediately before the I or P picture is cut out, the second partial stream after the I or P picture is cut out from the MPEG video stream 2, and the first partial stream is cut out. Disclosed is a technique for combining the second partial stream with the second partial stream to generate the edited stream 3. More specifically, when the picture displayed immediately before the second partial stream is an I picture, the picture is regarded as an in-frame coded picture. If the picture displayed immediately before the second partial stream is not an I picture, the one-way interframe prediction coded picture from the I picture immediately before the picture to the picture is decoded in order. A decoded image of the picture is obtained, and the picture re-encoded by in-frame coding is referred to as an in-frame coded picture. Finally, an in-frame coded picture is inserted between the first partial stream and the second partial stream, and the concatenation process is performed.

Japanese Unexamined Patent Publication No. 2002-300258

Niimi, 3 others, "Introduction of file-based production equipment", Journal of the Institute of Visual Media, Vol.67, No. 5, pp.374-378, 2013

In the system of Non-Patent Document 1 for HD video, the completed program is encoded by IntraOnly, but when targeting a large-capacity video such as 8K super high-definition video, Long is used from the viewpoint of coding efficiency. Encoding with GOP is required.

However, since the P picture and the B picture cannot be decoded independently, when editing a section other than the GOP unit, the edited coded stream cannot be correctly decoded. The reason for this will be described with reference to FIG. I, B, and P in the figure mean I picture, B picture, and P picture, respectively. When the GOP structure of the pre-replacement stream, which is the video-encoded stream before partial replacement editing, is as shown in FIG. 5A, the second to fourth frames are B pictures, so that when decoding the video. Refers to the first frame, which is the front I picture, and the fifth frame, which is the rear P picture. Since the 10th to 12th frames are B pictures, the 9th frame which is the front P picture and the 13th frame which is the rear P picture are referred to when decoding. Since the 13th frame is a P picture, the 9th frame, which is the front P picture, is referred to when decoding. Since the 14th to 16th frames are B pictures, the 13th frame, which is the front P picture, and the rear P picture or I picture are referred to when decoding.

FIG. 5B shows frames (P # 5, B # 6, B) from the 5th frame to the 9th frame in the display order with respect to the pre-replacement stream, which is the video-encoded stream before partial replacement editing. # 7, B # 8, P # 9) is partially replaced with a replacement stream (I # 1', B # 2', B # 3', B # 4', P # 5'). ing. At this time, the second to fourth frames (B # 2, B # 3, B # 4) of the post-replacement stream, which is the video-encoded stream after partial replacement editing, are frames to be referred to. Since # 5 does not exist, it cannot be decoded correctly. Similarly, the 10th to 13th frames (B # 10, B # 11, B # 12, P # 13) of the replaced stream are correct because P # 9, which is a frame to be referred to, does not exist. Cannot be decrypted. In addition, since the 13th frame (P # 13) cannot be decoded correctly, the 14th to 16th frames (B # 14, B # 15, B # 16) with the 13th frame as the reference frame are However, it cannot be decrypted correctly.

Therefore, a method for correctly decoding the edited coded stream will be described with reference to FIG. FIG. 6 shows the frames (P # 5, B # 6, B # 7, P # 5, B # 6, B # 7, from the 5th frame to the 9th frame in the display order with respect to the pre-replacement stream, which is the video-encoded stream before partial replacement editing. B # 8, P # 9) is partially replaced with a replacement stream (I # 1', B # 2', B # 3', B # 4', P # 5'). First, the GOP including the partial replacement section is decoded in GOP units, and the pre-replacement video is generated. After that, the pre-replacement video is edited, and the 5th to 9th frames (# 5, # 6, # 7, # 8, # 9) are replaced with the replacement video (# 1', # 2', # 3', Replace with # 4', # 5') to generate the post-replacement video. When the data to be replaced is given as a video coded stream (replacement stream), it is necessary to decode the replacement stream to generate the replacement video as shown in FIG. According to this method, the image after replacement can be correctly encoded. However, since the pre-replacement stream that has already undergone coding deterioration is once decoded and re-encoded, the quality of the post-replacement stream is further deteriorated.

Further, in the technique disclosed in Patent Document 1, the video coded stream can be cut out and concatenated by generating the above-mentioned in-frame coded picture, but the video coded stream is partially replaced and edited. There was a problem that it could not be done.

An object of the present invention made in view of such circumstances is to provide a video-coded stream editing device and a program capable of partially editing an arbitrary section of a video-coded stream and reducing quality deterioration due to the partial editing. To provide.

In order to solve the above problems, the video coded stream editing device according to the present invention performs partial replacement editing on a video coded stream encoded by using inter-frame prediction, and performs partial replacement editing on the video before partial replacement editing. A video coded stream editing device that generates a post-replacement stream, which is a video coded stream after partial replacement editing, from a pre-replacement stream, which is a coded stream, and is a replacement section of the pre-replacement stream. A decoder that decodes the replacement target GOP including the And, among the post-replacement video, the cut-out video excluding the frames that are located before the start point frame of the replacement section in the display order and do not refer to the frames after the start point frame at the time of encoding. And an encoder that encodes the cutout video with a code amount equal to or less than the code amount upper limit value to generate a replacement stream. , The section corresponding to the cut-out image of the pre-replacement stream is replaced with the replacement stream, and a partial replacement unit for generating the post-replacement stream is provided.

Further, in the video coding stream editing apparatus according to the present invention, the code amount upper limit value is cut out from the preset upper limit value of the code amount of 1 GOP by the video cutout portion of the replacement video. The feature is that the code amount is obtained by subtracting the code amount of the pre-replacement stream corresponding to the video that has not been replaced.

Further, in the video coding stream editing apparatus according to the present invention, the upper limit of the code amount is the image not cut out from the code amount of the replacement target GOP by the video cutting portion of the replaced video. It is characterized in that it is a code amount obtained by subtracting the code amount of the stream before replacement corresponding to.

Further, in the video-coded stream editing apparatus according to the present invention, the video cutting unit identifies the picture type of the start point frame of the replacement section of the GOP including the replacement section, and the picture type is I. If it is a picture, the cutout image is taken from the start point frame to the final frame of the replaced images, and if the picture type is not I-picture, the display order of the replaced images is displayed. It is characterized in that the cut-out image is from the frame immediately after the P picture or the I picture located immediately in front of the start point frame to the final frame.

Further, in order to solve the above-mentioned problems, the program according to the present invention is characterized in that the computer functions as the above-mentioned video-coded stream editing device.

According to the present invention, it is possible to partially edit a section having an arbitrary frame as a start point and an end point of a video-coded stream. In addition, quality deterioration when partially editing the video-coded stream can be reduced.

It is a block diagram which shows the structural example of the video coding stream editing apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows the operation example of the video coding stream editing apparatus which concerns on one Embodiment of this invention. It is a figure explaining the 1st specific example of the processing of the video coding stream editing apparatus which concerns on one Embodiment of this invention. It is a figure explaining the 2nd specific example of the processing of the video coding stream editing apparatus which concerns on one Embodiment of this invention. It is a figure explaining an example that the coded stream after editing cannot be correctly decoded. It is a figure explaining the technique which makes it possible to correctly decode the coded stream after editing. It is a graph which shows the PSNR with respect to the bit rate at the time of encoding the 8K super high definition video.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a configuration example of the video-coded stream editing device 1 according to the embodiment of the present invention. The video coding stream editing device 1 shown in FIG. 1 includes a replacement position designation unit 11, a decoder 12, a video replacement unit 13, a video cutout unit 14, an encoder 15, a partial replacement unit 16, and the like. To prepare for.

The video-coded stream editing device 1 is a device that performs partial replacement editing in which a part of a video-coded stream encoded by using inter-frame prediction is replaced with another stream. In the following description, the video-coded stream before partial replacement editing is referred to as "pre-replacement stream", and the video-coded stream after partial replacement editing is referred to as "post-replacement stream". Since the video-coded stream is encoded using inter-frame prediction, the GOP structure is Long GOP. However, the present invention targets the Closed GOP and excludes the Open GOP.

The transmission server 20 transmits the pre-replacement stream to the decoder 12, the partial replacement unit 16, and the video cutting unit 14 of the video coding stream editing device 1. Further, the transmission server 20 receives the replacement stream from the partial replacement unit 16.

When the start point and end point of partial replacement editing are specified by the operator of the video coding stream editing device 1, the replacement position designation unit 11 generates start point / end point information indicating the start point and end point of partial replacement editing. .. Then, the replacement position designation unit 11 outputs the start point / end point information to the decoder 12, the video replacement unit 13, the video cutting unit 14, and the partial replacement unit 16. The start point and end point can be specified by using, for example, a time code in the stream or a frame number in the display order. Further, any two frames of the video-coded stream can be designated as the start point and the end point, respectively, and the replacement section set at the start point and the end point does not have to be in GOP units.

The decoder 12 is a replacement target GOP (that is, replacement) including the start point and the end point of the pre-replacement stream input from the transmission server 20 based on the start point / end point information input from the replacement position designation unit 11. A GOP including an interval, which may be a plurality of GOPs) is decoded to generate a pre-replacement video (decoded video of the replacement target GOP). Then, the decoder 12 outputs the generated pre-replacement video to the video replacement unit 13. Further, the decoder 12 outputs the code amount of each frame belonging to the replacement target GOP, which is measured at the time of decoding, to the video cutting unit 14.

The video replacement unit 13 acquires the replacement video from an editing machine, a recording / replaying machine, etc., which are peripheral devices of the video coding stream editing device 1. Further, the video replacement unit 13 acquires the pre-replacement video from the decoder 12. Then, the video replacement unit 13 replaces the video from the start point to the end point (replacement section) of the pre-replacement video with the replacement video based on the start point / end point information input from the replacement position designation unit 11 and makes a difference. Generate post-replacement video. The video replacement unit 13 outputs the generated post-replacement video to the video cutting unit 14.

The video cutting unit 14 is a frame of the post-replacement video input from the video replacement unit 13 that is located before the start point frame of the replacement section in the display order, and is after the start point frame at the time of encoding. Generates a cutout video that excludes frames that do not refer to frames. Then, the video cutting unit 14 outputs the generated cutout video to the encoder 15. Further, the video cutting unit 14 outputs the code amount upper limit value of the cut video to the encoder 15. The details of the processing of the image cutting unit 14 will be described later.

The encoder 15 encodes the cutout video input from the video cutout unit 14 with a code amount equal to or less than the code amount upper limit value input from the video cutout unit 14 to generate a replacement stream. Then, the encoder 15 outputs the generated replacement stream to the partial replacement unit 16. The first frame in the decoding order of the replacement stream is an I picture.

The partial replacement unit 16 replaces the section corresponding to the cut-out video of the pre-replacement stream received from the transmission server 20 with the replacement stream input from the encoder 15 to generate the post-replacement stream. Then, the partial replacement unit 16 transmits the generated post-replacement stream to the transmission server 20.

FIG. 2 is a flowchart showing an operation example of the video-coded stream editing device 1. 3 and 4 are diagrams illustrating a specific example of the processing of the video-coded stream editing device 1. The operation of the video-coded stream editing device 1 will be described with reference to FIGS. 2 to 4. In addition, in FIG. 3 and FIG. 4, the frames are counted in the display order. That is, the frame numbers in FIGS. 3 and 4 mean POC (Picture Order Count), which is a display order number.

The video coded stream editing device 1 designates the replacement position by the replacement position designation unit 11 (step S101). In the example shown in FIG. 3, partial replacement editing of the 7th to 10th frames of the nGOP is performed on the pre-replacement stream received from the transmission server 20. In this case, the replacement position designation unit 11 generates information indicating the 7th and 10th frames of the nGOP as start point / end point information. In the example shown in FIG. 4, the partial replacement edit of the first to eighth frames of the nGOP is performed on the pre-replacement stream received from the transmission server 20. In this case, the replacement position designation unit 11 generates information indicating the first frame and the eighth frame of the nGOP as start point / end point information.

Next, the video-coded stream editing device 1 stores the stream of the replacement target GOP in the buffer in order to refer to the previous and next frames when the replacement target GOP is decoded by the decoder 12. Then, by measuring the remaining amount of the buffer, the code amount of each frame belonging to the replacement target GOP is acquired (step S102). Then, the decoder 12 decodes the replacement target GOP and generates the pre-replacement video (step S103). In the example shown in FIGS. 3 and 4, the decoder 12 decodes the nGOP to generate the pre-replacement video.

Next, the video coding stream editing device 1 acquires the replacement video by the video replacement unit 13, replaces the video in the replacement section of the pre-replacement video with the replacement video, and generates the post-replacement video. (Step S104). In the example shown in FIG. 3, the video replacement unit 13 acquires # 1'to # 4'as replacement video. In the example shown in FIG. 4, the video replacement unit 13 acquires # 1'to # 8'as replacement video.

Next, the video coding stream editing device 1 confirms the GOP structure of the GOP including the replacement section by the video cutting unit 14, and identifies the picture type of the start point frame of the replacement section. When the picture type of the start point frame of the replacement section is I-picture (step S105-Yes), the video cutout unit 14 sets the cutout video from the start point frame to the final frame of the replaced video. (Step S106). In the example shown in FIG. 4, since the picture type of the start point frame (I # 1) of the replacement section is I-picture, the video cutout portion 14 is used for all frames of the replaced video (first frame (# 1'). ) To the final frame (# 12)) is used as the cutout video.

On the other hand, when the picture type of the start point frame of the replacement section is P picture or B picture (step S105-No), the video cutting unit 14 is in the display order of the pre-replacement stream among the post-replacement videos. In (POC order), the frame position (POC) immediately after the P picture or I picture located in front of the start point frame is specified. Then, among the replaced images, the cut-out image is taken from the frame corresponding to the previously specified frame position (POC) to the final frame (step S107). In the example shown in FIG. 3, since the picture type of the start point frame (B # 7) of the replacement section is B picture, the video cutout portion 14 is P located immediately in front of the start point frame (B # 7). The frame position (sixth frame) after one picture (P # 5) is specified. Then, among the images after replacement, the 6th frame (# 6) to the final frame (# 12) are taken as the cutout images.

Next, the video coding stream editing device 1 uses the video cutting unit 14 to obtain the code amount Y bit of the pre-replacement stream corresponding to the video not cut out by the video cutting unit 14 among the replaced videos. calculate. When the process of step S106 is performed, the entire image after replacement is cut out by the video cutting unit 14, so that Y = 0 bit. On the other hand, when the process of step S107 is performed, the P picture or I picture located immediately before the start point frame in the display order (POC order) from the first frame of the stream before replacement by the video cutting unit 14. Calculate the amount of code up to the frame of. In the example shown in FIG. 3, the code amount from the first frame (I # 1) of the stream before replacement to the frame (P # 5) of the P picture located immediately before the start point frame in the display order (POC order). Is calculated.

Then, the video coding stream editing device 1 calculates the code amount upper limit value of the cutout video by the video cutting unit 14 (step S108). The upper limit of the code amount of the cut-out video is a code amount obtained by subtracting the Y bit from the preset upper limit value X1 bit of the code amount of 1 GOP. Alternatively, the upper limit of the code amount of the cut-out video is the code amount obtained by subtracting the Y bit from the code amount X2 bits of the replacement target GOP. The code amount X2 bit of the replacement target GOP is a value obtained by totaling the code amounts of the frames belonging to the replacement target GOP calculated in step S103.

Next, in the video coded stream editing device 1, the encoder 15 sets the upper limit of the code amount of the cutout video to (X1-Y) bits or (X2-Y) bits, and the code amount is equal to or less than the upper limit of the code amount. The cutout video is encoded to generate a replacement stream (step S109). At that time, as shown in FIG. 3, the first frame in the decoding order of the replacement stream is an I picture. Further, the last frame in the display order of the replacement stream is a P picture or an I picture. Other picture types of the replacement stream are arbitrary, but as the number of I pictures increases, the coding efficiency decreases, so it is preferable to use B pictures or P pictures. It is considered that the preset upper limit value X1 of the code amount per 1 GOP is larger than the code amount X2 of the actual replacement target GOP. Therefore, when the value of X1 is set in operation, it is better to set the upper limit of the code amount of the cutout image to the (X1-Y) bit than to set it to the (X2-Y) bit. Can be reduced.

Next, the video-coded stream editing device 1 replaces the section corresponding to the cut-out video of the pre-replacement stream with the replacement stream by the partial replacement unit 16 to generate the post-replacement stream (step S110). In the example shown in FIG. 3, for the nGOP of the replacement stream, the first 5 frames (I # 1, B # 2, B # 3, B # 4, P # 5) are the same as the pre-replacement stream. .. Therefore, with respect to these frames, quality deterioration due to recoding does not occur.

Although the video coded stream editing device 1 has been described above, it is also possible to use a computer to function as the video coded stream editing device 1. Such a computer stores a program describing processing contents that realize each function of the video coding stream editing device 1 in the storage unit of the computer, and the CPU of the computer reads and executes this program. Can be realized with.

The program may also be recorded on a computer-readable medium. It can be installed on a computer using a computer-readable medium. Here, the computer-readable medium on which the program is recorded may be a non-transient recording medium. The non-transient recording medium is not particularly limited, but may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

As described above, in the present invention, when performing partial replacement editing on a coded stream whose GOP structure is Long GOP, among the frames located before the start point frame in the display order, after the start point frame. For frames that do not refer to the frame, the original unedited video coded stream is used as it is. Therefore, according to the present invention, it is possible to reduce the deterioration of image quality due to recoding even if the video coding stream is partially edited. Further, since the cut-out video is encoded with a code amount equal to or less than the code amount upper limit value, it can be replaced with another content content without violating the code amount constraint, and the code amount management becomes easy.

Although the above embodiments have been described as representative examples, it will be apparent to those skilled in the art that many modifications and substitutions can be made within the spirit and scope of the invention. Therefore, the present invention should not be construed as being limited by the above-described embodiments, and various modifications and modifications can be made without departing from the scope of claims. For example, it is possible to combine a plurality of the constituent blocks described in the configuration diagram of the embodiment into one, or to divide one constituent block into one.

1 Video coded stream editing device 11 Replacement position specification unit 12 Decoder 13 Video replacement unit 14 Video cutout unit 15 Encoder 16 Partial replacement unit 20 Sending server

Claims (5)

Partial replacement editing is performed on the video coded stream encoded using motion compensation, and the video code after partial replacement editing is performed from the pre-replacement stream, which is the video coding stream before partial replacement editing. It is a video coded stream editing device that generates a post-replacement stream, which is a converted stream.
A decoder that decodes the replacement target GOP including the replacement section of the pre-replacement stream to generate the pre-replacement video, and
A video replacement unit that replaces the video in the replacement section of the pre-replacement video with the replacement video to generate the post-replacement video.
Among the post-replacement images, a cut-out image is generated excluding frames that are located before the start point frame of the replacement section in the display order and do not refer to frames after the start point frame at the time of encoding. At the same time, the video cutout unit that calculates the upper limit value of the code amount of the cutout video and
An encoder that encodes the cutout video with a code amount equal to or less than the code amount upper limit value to generate a replacement stream.
A partial replacement unit that generates the post-replacement stream by replacing the section corresponding to the cut-out video of the pre-replacement stream with the replacement stream.
A video-coded stream editing device, characterized in that it comprises. The code amount upper limit is the code amount of the pre-replacement stream corresponding to the video not cut out by the video cutout portion of the post-replacement video from the preset upper limit of the code amount of 1 GOP. The video coded stream editing device according to claim 1, wherein the code amount is subtracted. The code amount upper limit value is a code obtained by subtracting the code amount of the pre-replacement stream corresponding to the image of the post-replacement video that was not cut out by the video cutting unit from the code amount of the replacement target GOP. The video coded stream editing apparatus according to claim 1, wherein the image is a quantity. The video cutout portion identifies the picture type of the start point frame of the replacement section of the GOP including the replacement section.
When the picture type is an I picture, the cutout video is defined from the start point frame to the final frame of the replaced video.
If the picture type is not an I picture, the P picture or the frame one after the I picture located closest to the front of the start point frame in the display order to the final frame of the replaced video is cut off. The video-encoded stream editing apparatus according to any one of claims 1 to 3, wherein the video is output. A program for operating a computer as the video-coded stream editing device according to any one of claims 1 to 4.

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