Ffmpeg concat video stops playing how to#
Ffmpeg concat video stops playing code#

Ffmpeg concat video stops playing how to#

We'll take a look at how to use the seeking parameter -ss, but you can also use other commands such as the trim filter.

Cut/trim a video with FFmpegįFmpeg offers different commands that you can use to split up a video. We'll finish off by looking at how you can achieve the same results using Shotstack - a cloud-based video editing API. We'll look at some FFmpeg commands that you can use to trim a video into different parts and then see how you can take different videos and concatenate them into a single video. We'll see how to do exactly that using FFmpeg - a command-line utility that can be used to create, edit and process different types of media. When editing a video, you might want to cut out some parts or you might want to stitch together different videos by cutting sections from different sources and concatenating them into a single video. Setting shortest=None will get it to only output -shortest in the command line, as expected.A common feature of video editing applications is the ability to cut/trim videos. Here’s the generated command line: ffmpeg -i /Users/CS255/Desktop/git/python/fmva/sample_files/output/Fleece_04_10_frame_test_annotated_10NOV2020_1537_16.mp4 -i /Users/CS255/Desktop/git/python/fmva/sample_files/Fleece_04_10_frame_test.mp4 -filter_complex concat=a=1:n=1:v=1 -map -f mov -crf 18 -hls_list_size 0 -hls_time 10 -movflags faststart -pix_fmt yuv420p -shortest 1 /Users/CS255/Desktop/git/python/fmva/sample_files/output/Fleece_04_10_frame_test_annotated_w_audio_10NOV2020_1537_16.mp4 -loglevel error -y When ffmpeg-python processes its kwargs, it sorts them, shortest lands at the end of the list, the “1” appears right before the output file path, and ffmpeg drops an extra output file, named “1”, in the current working directory of the script. Default value is 0.įncat(video_component, audio_component, v=1, a=1)īut -shortest is a flag for ffmpeg, not a keyword arg. _filters.py, line 130: shortest: If set to 1, force the output to terminate when the shortest input terminates. Usage shortest=1 is documented in the api spec and here: Stream = ffmpeg.output(stream, 'output videos/' + input_video_name + '.mp4', shortest=1) Stream = ncat(input_video, input_audio, v=1, a=1) Input_audio = ffmpeg.input('input audio/'+ input_audio_name + input_audio_extension) Input_video = ffmpeg.input('input videos/' + input_video_name + input_video_extension) What value for shortest should I use here? Am I correct in assessing that I’m just using the wrong value for shortest? Many thanks! import ffmpeg Setting it to None my program runs, but the audio still won’t be cut off with this set to None, of course. This tells me that the shortest argument was a possible argument, but that the 1 value that I assign to it is wrong. and Error splitting the argument list: Option not found Using shortestfoo instead gives me this error, as expected: Unable to find a suitable output format for '1' and 1: Invalid argument

Ffmpeg concat video stops playing code#

The second from the bottom line from the block of code below contains shortest=1, which I’d expect to work, but I get this error instead: Default value is 0.” I can’t get it to work, though. That page also states that I should be able to add shortest as an argument to get my desired result: “If set to 1, force the output to terminate when the shortest input terminates. I want the output video to stop when the visuals stop playing, so I want it to cut off the audio, but I can’t get it to work. According to this FFmpeg docs page, this is the intended behaviour: “The concat filter will use the duration of the longest stream in each segment (except the last one), and if necessary pad shorter audio streams with silence.” I got this working, but the problem is that ncat by default keeps playing the audio from bar.webm while the visuals from foo.mp4 have stopped playing. I want to replace the audio from foo.mp4 with the audio from bar.webm, while keeping the visuals of foo.mp4.

I’m trying to use the shortest=1 argument in ffmpeg.output(), but my program keeps giving me errors when I use it. I’m using ffmpeg-python and ffmpeg for my first time.