[FFmpeg-user] Prores enable all audio channels on output file

[Rens Dijkshoorn]

----- Original Message -----
> From: "Carl Eugen Hoyos" <cehoyos at ag.or.at>
> To: ffmpeg-user at ffmpeg.org
> Sent: Friday, 12 December, 2014 15:51:14
> Subject: Re: [FFmpeg-user] Prores enable all audio channels on output file

> Kevin Wells <kevwells <at> hotmail.co.uk> writes:

> > I am using this version below, and it is not
> > working, it is disabling all but the first audio
> > channel.

> This would be the expected behaviour but I fear this
> is not always what's happening, I believe there is a
> ticket open.


This patch is not recommended for release, just a quick solution
to enable timecode and all audio tracks.


diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 9445417..576e278 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2130,6 +2130,10 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
     (version == 1) ? avio_wb32(pb, 104) : avio_wb32(pb, 92); /* size */
     ffio_wfourcc(pb, "tkhd");
     avio_w8(pb, version);
+    if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO ||
+        track->enc->codec_type == AVMEDIA_TYPE_DATA) /* enable all audio & data tracks */ 
+    avio_wb24(pb, 0xf);
+    else
     avio_wb24(pb, flags);
     if (version == 1) {
         avio_wb64(pb, track->time);
@@ -2150,7 +2154,7 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
     avio_wb32(pb, 0); /* reserved */
     avio_wb32(pb, 0); /* reserved */
     avio_wb16(pb, 0); /* layer */
-    avio_wb16(pb, group); /* alternate group) */
+    avio_wb16(pb, 0x0); /* set alternate group 0 as default ) */
     /* Volume, only for audio */
     if (track->enc->codec_type == AVMEDIA_TYPE_AUDIO)
         avio_wb16(pb, 0x0100);

Regards

Rens