It will typically take less than ten seconds to run. The batch file, and ffmpeg.exe, must both be put in the same folder as the. Then I created a simple batch file (concat.bat), with the following contents: :: Create File Listįfmpeg -f concat -i mylist.txt -c copy output.mp4
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I renamed the files (as file1.mp4, file2.mp4, file3.mp4) such that the parts were in the correct order for viewing the complete tv episode.
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mp4 video files) the following was an effective solution for Windows 7, and does NOT involve re-encoding the files. mp4 files (which I obtained from : a 50 minute tv episode, downloadable only in three parts, as three.
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Use this method with formats that support file-level concatenation $ ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4įor Windows: (echo file 'first file.mp4' & echo file 'second file.mp4' )>list.txtįfmpeg -safe 0 -f concat -i list.txt -c copy output.mp4 Use this method when you want to avoid a re-encode and your format does not support file-level concatenation (most files used by general users do not support file-level concatenation). ffmpeg -i opening.mkv -i episode.mkv -i ending.mkv \ If you want to avoid the re-encode, you could re-encode just the inputs that don't match so they share the same codec and other parameters, then use the concat demuxer to avoid re-encoding everything. Note that this method performs a re-encode of all inputs. Use this method if your inputs do not have the same parameters (width, height, etc), or are not the same formats/codecs, or if you want to perform any filtering. ts files together and have it work.įFmpeg has three concatenation methods: 1. This happens about half way through encoding which makes me think that you can't concat two. Non-existing SPS 0 referenced in buffering periodĮrror, non monotone timestamps 13779431 >= 13779431kbits/sĪv_interleaved_write_frame(): Error while opening file Unfortunately I'm getting the following error message coming back from ffmpeg during encoding: sps_id out of range ffmpeg -i part1.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part1.tsįfmpeg -i part2.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part2.tsįfmpeg -y -i parts.ts -acodec copy -ar 44100 -ab 96k -coder ac -vbsf h264_mp4toannexb parts.mp4 The files are h264 and aac encoded and I'm hoping to keep the quality the same or as close to original as possible. ts files and then concatenating them and then trying to encode that concatenated. I need this to be an automatic process hence why I chose ffmpeg.
On a separate question, is there a forum to report bugs in the MP4Tools program? I have found one MKV that crashes it on startup and another that crashes it on exit.I'm trying to concatenate two mp4 files using ffmpeg.
I do have some that are vc1, ac3 5.1 already so for those the audio would be copied.
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I would like to preserve the full quality if at all possible as I like the final result and the file size is comparable to the original MKV. Given the following MP4Tools settings, what would you suggest as the ffmpeg command line for both the video and audio? I don't have a great many to do but the Mac Mini takes around 9 hours to complete one on its i5 2.6GHz processor. I would like to deal with the VC1 to H.264 transcodes on my main machine (i7 4770K 4.5GHz) using ffmpeg because it will finish much faster. I have just started using MP4Tools on my Mac Mini to convert some MKV BDs to M4V for watching on an Apple TV 4 and while it is great for remuxing from MKV to M4V, I am finding the Mac Mini struggles when transcoding a video stream from VC1 to H.264.
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