Hi there, I experience this quite often - not always.
1. Input: .MOV (iMovie export, h.264 or mpeg-4)
2. MP4 H.264 mencoder preset
3. CABAC, bframes, two-pass (its' the same w/out two-pass)
4. Possibly pointless: space in filename
Video compression works like a charm, I tried to copy the *.264 elementary stream while audio was normalized and it is perfect.
When muxing occurs, this happens:
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
configuration: --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
Input #0, h264, from '/Volumes/temp/14 Dimitris Kazakis.264':
Duration: N/A, bitrate: N/A
Stream #0.0, 25.00 fps(r): Video: h264, yuv420p, 1280x720
Input #1, wav, from '/Volumes/temp/14 Dimitris Kazakis.wav':
Duration: 00:21:56.6, start: 0.000000, bitrate: 1411 kb/s
Stream #1.0: Audio: pcm_s16le, 44100 Hz, stereo, 1411 kb/s
Output #0, mp4, to '/Volumes/temp/14 Dimitris Kazakis.aac.mp4':
Stream #0.0: Audio: aac, 48000 Hz, mono, 64 kb/s
Stream #1.0 -> #0.0 [sync #0.0]
Press [q] to stop encoding
size= 10766kB time=1316.6 bitrate= 67.0kbits/s
video:0kB audio:10283kB global headers:0kB muxing overhead 4.694838%
Adjusting AVC SizeLength to 16 bits
AVC-H264 import - frame size 1280 x 720 at 25.000 FPS
Adjusting AVC SizeLength to 24 bits
Import results: 32916 samples - Slices: 580 I 32960 P 32292 B - 1 SEI - 578 IDR
IsoMedia import - track ID 1 - Audio (SR 48000 - 1 channels)
Saving /Volumes/temp/14 Dimitris Kazakis.mp4: 0.500 secs Interleaving
Encoding completed on Thu Dec 12 17:58:55 CET 2013
It results into a completely black video track...
Now I'm using a work-around by copying the elementary 264 stream during audio compression, then I use MKVToolnix to mux and Quicktime7 to export.
Is there something that could be fixed?
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Just checked... same result with no blank spaces in the whole path.
Apparently it depends on video (large 720p export from iMovie, not always).
I forgot to mention it... of course I registered ffmpegX, years ago!
If at least the "Keep Elementary Streams" option was working, I wouldn't have to keep the eye on the exact moment of audio encoding in order to copy the .264 stream (which is good!)
Last edited by panet; 8th Jan 2014 at 08:08.