Changing speed of a part of a video
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I want to slow down only a small part of my video. I used this filter_complex:
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19 [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39 [z];
[x][y][z] concat=3 [video]
In the resulting [video] the [x] and [y] are OK, but after it the last frame of [y] is frozen for many seconds (about 36), showing it as a still frame, and only after it is playing the [z] part.
I think that something is wrong with the presentation time stamp of the [z] part, but I have no idea how to fix it. Or - maybe - reach my goal by other, simpler way.
ffmpeg
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
add a comment |
I want to slow down only a small part of my video. I used this filter_complex:
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19 [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39 [z];
[x][y][z] concat=3 [video]
In the resulting [video] the [x] and [y] are OK, but after it the last frame of [y] is frozen for many seconds (about 36), showing it as a still frame, and only after it is playing the [z] part.
I think that something is wrong with the presentation time stamp of the [z] part, but I have no idea how to fix it. Or - maybe - reach my goal by other, simpler way.
ffmpeg
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
add a comment |
I want to slow down only a small part of my video. I used this filter_complex:
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19 [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39 [z];
[x][y][z] concat=3 [video]
In the resulting [video] the [x] and [y] are OK, but after it the last frame of [y] is frozen for many seconds (about 36), showing it as a still frame, and only after it is playing the [z] part.
I think that something is wrong with the presentation time stamp of the [z] part, but I have no idea how to fix it. Or - maybe - reach my goal by other, simpler way.
ffmpeg
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
I want to slow down only a small part of my video. I used this filter_complex:
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19 [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39 [z];
[x][y][z] concat=3 [video]
In the resulting [video] the [x] and [y] are OK, but after it the last frame of [y] is frozen for many seconds (about 36), showing it as a still frame, and only after it is playing the [z] part.
I think that something is wrong with the presentation time stamp of the [z] part, but I have no idea how to fix it. Or - maybe - reach my goal by other, simpler way.
ffmpeg
ffmpeg
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
edited Feb 8 at 21:27
MarianD
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
asked Feb 8 at 20:47
MarianDMarianD
1,5191718
1,5191718
add a comment |
add a comment |
1 Answer
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The trim filter does not reset timestamps, but the concat filter expects each segment to start with 0 timestamp. So,
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19,setpts=PTS-STARTPTS [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39,setpts=PTS-STARTPTS [z];
[x][y][z] concat=3 [video]
answered Feb 9 at 6:19
GyanGyan
16.1k21848
add a comment |
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1 Answer
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1 Answer
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The trim filter does not reset timestamps, but the concat filter expects each segment to start with 0 timestamp. So,
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19,setpts=PTS-STARTPTS [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39,setpts=PTS-STARTPTS [z];
[x][y][z] concat=3 [video]
answered Feb 9 at 6:19
GyanGyan
16.1k21848
add a comment |
The trim filter does not reset timestamps, but the concat filter expects each segment to start with 0 timestamp. So,
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19,setpts=PTS-STARTPTS [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39,setpts=PTS-STARTPTS [z];
[x][y][z] concat=3 [video]
answered Feb 9 at 6:19
GyanGyan
16.1k21848
add a comment |
The trim filter does not reset timestamps, but the concat filter expects each segment to start with 0 timestamp. So,
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19,setpts=PTS-STARTPTS [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39,setpts=PTS-STARTPTS [z];
[x][y][z] concat=3 [video]
answered Feb 9 at 6:19
GyanGyan
16.1k21848
The trim filter does not reset timestamps, but the concat filter expects each segment to start with 0 timestamp. So,
[0:v] split=3 [p1][p2][p3];
[p1] trim=start=1.19:end=34.19,setpts=PTS-STARTPTS [x];
[p2] trim=34.19:36.39,setpts=2*N/FRAME_RATE/TB [y];
[p3] trim=start=36.39,setpts=PTS-STARTPTS [z];
[x][y][z] concat=3 [video]
answered Feb 9 at 6:19
GyanGyan
16.1k21848
answered Feb 9 at 6:19
GyanGyan
16.1k21848
answered Feb 9 at 6:19
GyanGyan
16.1k21848
answered Feb 9 at 6:19
GyanGyan
16.1k21848
16.1k21848
add a comment |
add a comment |
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