[FFmpeg-user] Attempting to record video for download onto an Android tablet, experiencing what I think is encoding issues which mean i can't play the video on Android gallery.
Hello, I'm new to this mailing list. I have posted a question on stackoverflow here, outlining more of what is happening with my experiment. https://stackoverflow.com/questions/58262560/how-to-fix-video-in-gallery-from-not-playing-probable-cause-encoding-from-ffmpe Suffice to say, I'm trying to record video from a pi and send the video through to a tablet for later playback. Any help would be much appreciated! Thanks Nathan ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Audio duration difference
Now I'm confused From my calculation: Audio length: 5580.7 seconds Video length: 133799/(24000/1001) = 5580.533292 seconds From the container: Audio length: 5580.704 --> that is what ffmpeg tell me when I reencode the stream Video length: 5580.575 --> Adobe Premiere Pro showed me 133799 frames, but the container metadata 133800/(24000/1001) = 5580,575. Don't know why there is a difference ... And all audio streams of the blu-ray have an different duration: English: 5580.704 Swedish: 5580.694 But this difference is only in the end, or not? > Where did you get the original length from? Is "133799" the number of video > frames in the file? Does the audio track start at the same time as the video > track? Is it the same length as the video track? At least on a DVD the > asnwer to the the last > 2 question is not guaranteed to be "yes". 133799 is the total frame number Premiere told me. I don't know if it start at the same time, I think so, otherwise it would be out of sync. > Are you claiming you have corrected for both of those by trimming samples off > in some program? I didn't touch the stream only extracted from mkv which I've passthrough ripped from blu-ray disc. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Audio duration difference
On 2019-10-06 12:38, Felix Muster via ffmpeg-user wrote: > Hello > > > > Can you please explain me this difference: > > > > I have an audio-stream from a blu-ray (23.976 fps). > > When I calculate the duration it should be: 133799/(24000/1001) = > 5580.533292 seconds. > à 01:33:00.70 = 5580.7 seconds > > > > Why is there a difference of 0.166708 seconds? Where did you get the original length from? Is "133799" the number of video frames in the file? Does the audio track start at the same time as the video track? Is it the same length as the video track? At least on a DVD the asnwer to the the last 2 question is not guaranteed to be "yes". Are you claiming you have corrected for both of those by trimming samples off in some program? ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Audio duration difference
Hello Can you please explain me this difference: I have an audio-stream from a blu-ray (23.976 fps). When I calculate the duration it should be: 133799/(24000/1001) = 5580.533292 seconds. When I encode the extracted audio stream it is: _ffmpeg -i _audio2.flac -f null - ffmpeg version N-95216-ge6625ca41f Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.2.1 (GCC) 20190918 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf libavutil 56. 35.100 / 56. 35.100 libavcodec 58. 59.101 / 58. 59.101 libavformat58. 33.100 / 58. 33.100 libavdevice58. 9.100 / 58. 9.100 libavfilter 7. 61.100 / 7. 61.100 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc55. 6.100 / 55. 6.100 Input #0, flac, from '_audio2.flac': Metadata: title : THE_GIRL_WITH_THE_DRAGON_TATTOO.Title1 encoder : Lavf58.20.100 Duration: 01:33:00.70, start: 0.00, bitrate: kb/s Stream #0:0: Audio: flac, 48000 Hz, 5.1(side), s16 Stream mapping: Stream #0:0 -> #0:0 (flac (native) -> pcm_s16le (native)) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: title : THE_GIRL_WITH_THE_DRAGON_TATTOO.Title1 encoder : Lavf58.33.100 Stream #0:0: Audio: pcm_s16le, 48000 Hz, 5.1(side), s16, 4608 kb/s Metadata: encoder : Lavc58.59.101 pcm_s16le size=N/A time=01:33:00.70 bitrate=N/A speed= 435x video:0kB audio:3139146kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown à 01:33:00.70 = 5580.7 seconds Why is there a difference of 0.166708 seconds? Best Felix ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] trimmed audio has wrong duration
> What is the point of doing this calculation? I need to trim 1.001 seconds > It’s probably because flac is mostly a stream format, and you’re doing a > stream copy. Re-encoding should fix all of this, it’s relatively inexpensive, > > and it’s lossless after all, but if you really don’t want this, maybe try > putting it in an ogg. Hey, great. That was it! Thank you. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
