ffmpeg only encoding 21 seconds of flv

[zzyzx2]

Converting from avi to flv, the first pass will convert the whole film, but the second pass only encodes 21 seconds of each individual fille. Very strange. here is the script I was playing with:

for %%a in ("*.avi") do ffmpeg -y -i "%%a" -s 1920x1080 -f flv -acodec libmp3lame -ab 128000 -ar 44100 -vcodec flv -pass 1 "%%a".a.flv"
for %%a in ("*.avi") do ffmpeg -y -i "%%a" -s 1920x1080 -f flv -acodec libmp3lame -ab 128000 -ar 44100 -vcodec flv -pass 2 "%%a".flv"
if exist *.a.flv del *.a.flv
if exist *.log del *.log
pause

[Baldrick]

Have you just tried without the foor loop and see if you get same problem?


And the flv codec is crap. Try instead x264. It's supported in flv or output as mp4. Both are supported in flash. YOu might need a newer ffmpeg though.

[zzyzx2]

"foor loop"? hmm. I dont understand that. I do have the new ffmpeg. I have already tried encoding to x264 avi and have decreased the filesize in half, but have noticed that flv is smaller with the good quality.

[Baldrick]

The for %% in. Just run the ffmpeg command in the command prompt and see if any erros

But x264 is MUCH better than flv. Try google for ffmpeg x264 examples for some good settings to use.

[Chris K]

I do have the new ffmpeg.

If you insist on using flv, try an older FFmpeg version.

This is my experience...

version 30656 writes a log file at the first pass.
version 31572 and higher writes a empty log file.

I looks like flv 2-pass support is broken or perhaps deprecated.

[zzyzx2]

Every time I try the x264 codec it keeps giving me an error abput presets. I have downloaded the ffmpeg obviously and cannot get the presets to work. Also, there are only around 10 presets and none of them match any of the presets that are in batch scripts that I have tried using.


I have alot of video from when I was overseas, but its taking up too mush room. I want to compress it with excellent quality, but smaller filesize..

[davexnet]

If you don't mind using a GUI, give Staxrip 1171 a try. you can start with a preset and modify as necessary.

Jagabo recently made a post where he had come up with some settings that he felt offered the best compromise
between encoding speed, quality and file size.

[zzyzx2]

If you don't mind using a GUI, give Staxrip 1171 a try. you can start with a preset and modify as necessary.

Jagabo recently made a post where he had come up with some settings that he felt offered the best compromise
between encoding speed, quality and file size.

This requires a dgdecnv license file. also the trial that i downloaded says there is a dll missing. Thanks anyway

[davexnet]

Staxrip itself doesn't require any license. Staxrip attempts to use the Avisynth tool you mentioned (third party)
which does require a license. Staxrip can be configured not to use it, problem solved.
There is no trial, it's free software.

Not sure about the dll, unless it's related to dgdecnv.

See the comments on this page to disable the usage of dgdecnv:
http://www.techsupportalert.com/best-free-video-encoder.htm

[zzyzx2]

AHHHH, ok now I got it fixed. Thanks. Am trying it now alongside AVANTI.